package com.example.activitytest;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

public class SecondActivity extends AppCompatActivity {
    private static final String TAG ="SecondActivity";
    private Button btnBack;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        Log.d(TAG,"执行了 onCreate()方法");
        btnBack = (Button) findViewById(R.id.btnBack);
        btnBack.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v) {
                setResult(RESULT_OK);
                finish();
            }
         });
    }
}
